Ryuutarou Ooyama
大山 リュウタロウ
Ryuutarou Ooyama is the Dragon Empire branch chief who uses the Narukami Clan, and is a "Narukami Clan Leader".
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Cardfight!! Vanguard G
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Cardfight!! Vanguard G: GIRS Crisis-hen
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Cardfight!! Vanguard G: Stride Gate-hen
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Cardfight!! Vanguard G Next
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Cardfight!! Vanguard: Shinemon-hen
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